Calcium

CALCIUM IS ESSENTIAL FOR THE GROWTH OF CORAL
he optimum calcium concentration in a marine aquarium is 410 - 450 mg per litre (ppm). Easy-Life Calcium is a powerful, concentrated product which compensates for a deficiency.
Weekly after testing 10 ml per 100 litres (1 fl oz per 80 US gallons) raises the Ca-concentration with 20 ppm.